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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing: Alloy Design to Develop New Feedstock Materials
Presentation Title Micro-crack Mitigation by Alloy Modification in the Additively Manufactured Ni-base Superalloy CM247LC
Author(s) Christian Leinenbach, Seth Griffiths, Hossein G Tabasi, Toni Ivas, Xavier Maeder, Anthony De Luca, Kai Zweiacker, Rafal Wrobel, Jamasp Jhabvala, Roland E Logé
On-Site Speaker (Planned) Christian Leinenbach
Abstract Scope Additive Manufacturing (AM) of Nickel-base superalloys has the potential to create complex monolithic structures that can lead to performance and cost improvements in structures for high temperature environments. However, the rapid melting and solidification inherent to AM often results in micro-cracking. Samples were fabricated with CM247LC powder on two separate commercial SLM machines. Extensive SEM and TEM analysis was performed on the as fabricated samples to better understand microstructure, segregation, and defect formation. A combination of experimental data and thermodynamic simulations were utilized to develop a new variant of CM247LC with the goal to mitigate crack formation. The new alloy was processed with two commercial SLM machines and extensive microstructure characterization was performed. Other micro-crack mitigation strategies will be discussed.


3D Characterization of Cracks Formed in “Weldable” AA6061 and Implications for Alloy Design
Accidental Alloy Development: In-situ Evolution of AM Powder and Opportunities for New Material Synthesis Pathways
An Interdisciplinary Approach for Alloy Design for Additive Manufacturing
Application of Taguchi, Response Surface, and Artificial Neural Networks for Rapid Optimization of Direct Metal Laser Sintering Process
CALPHAD Informed Design of Rare-earth Containing Alloys for Additive Manufacturing
Characterization of Spatter with Organized Features in Laser Powder Bed Fusion
Development of Oxidation Resistant Multi-Principle Element Alloys Applied with Additive Manufacturing
High-Throughput Accelerated Alloy Development
Laser Additive Manufacturing of Nanocomposite Powders
Mechanical Alloying of Feedstock Powder for Additive Manufacturing by Selective Laser Melting: Aluminum Alloy Matrix Composites
Micro-crack Mitigation by Alloy Modification in the Additively Manufactured Ni-base Superalloy CM247LC
Microstructure and Property Variability in DED Inconel 718 as a Function of Build Rate
Opportunities to Improve the Mechanical Properties of Titanium Alloys Produced by Laser Powder Bed Fusion
Optimization of Nitrogen-Atomized 17-4 Stainless Steel Feedstock for AM Processing
Processing of Y2O3-modified Nickel Superalloy by Selective Laser Melting.
Residual Stress Mitigation of Additive Manufactured Stainless Steel 316L Components through the Directed Energy Deposition Inclusion of TiC Nanoparticles
Sensitivity Analysis and Composition Design for Metal Additive Manufacturing Using CALPHAD-based ICME Framework

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